From: mohammad.athari.ismail@intel.com
To: Alexandre Torgue <alexandre.torgue@st.com>,
Jose Abreu <joabreu@synopsys.com>,
"David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>
Cc: Ong Boon Leong <boon.leong.ong@intel.com>,
Voon Weifeng <weifeng.voon@intel.com>,
Wong Vee Khee <vee.khee.wong@intel.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
mohammad.athari.ismail@intel.com
Subject: [PATCH v2 net-next] net: pcs: Enable pre-emption packet for 10/100Mbps
Date: Fri, 23 Apr 2021 07:06:45 +0800 [thread overview]
Message-ID: <20210422230645.23736-1-mohammad.athari.ismail@intel.com> (raw)
From: Mohammad Athari Bin Ismail <mohammad.athari.ismail@intel.com>
Set VR_MII_DIG_CTRL1 bit-6(PRE_EMP) to enable pre-emption packet for
10/100Mbps by default. This setting doesn`t impact pre-emption
capability for other speeds.
Signed-off-by: Mohammad Athari Bin Ismail <mohammad.athari.ismail@intel.com>
---
v2 changelog:
-Removed useless (). Comment fron Leon Romanovsky.
---
drivers/net/pcs/pcs-xpcs.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c
index 944ba105cac1..ea33842eb0f4 100644
--- a/drivers/net/pcs/pcs-xpcs.c
+++ b/drivers/net/pcs/pcs-xpcs.c
@@ -66,6 +66,7 @@
/* VR_MII_DIG_CTRL1 */
#define DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW BIT(9)
+#define DW_VR_MII_DIG_CTRL1_PRE_EMP BIT(6)
/* VR_MII_AN_CTRL */
#define DW_VR_MII_AN_CTRL_TX_CONFIG_SHIFT 3
@@ -666,6 +667,10 @@ static int xpcs_config_aneg_c37_sgmii(struct mdio_xpcs_args *xpcs)
* PHY about the link state change after C28 AN is completed
* between PHY and Link Partner. There is also no need to
* trigger AN restart for MAC-side SGMII.
+ *
+ * For pre-emption, the setting is :-
+ * 1) VR_MII_DIG_CTRL1 Bit(6) [PRE_EMP] = 1b (Enable pre-emption packet
+ * for 10/100Mbps)
*/
ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL);
if (ret < 0)
@@ -686,7 +691,7 @@ static int xpcs_config_aneg_c37_sgmii(struct mdio_xpcs_args *xpcs)
if (ret < 0)
return ret;
- ret |= DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW;
+ ret |= DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW | DW_VR_MII_DIG_CTRL1_PRE_EMP;
return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1, ret);
}
--
2.17.1
next reply other threads:[~2021-04-22 23:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-22 23:06 mohammad.athari.ismail [this message]
2021-04-22 23:53 ` [PATCH v2 net-next] net: pcs: Enable pre-emption packet for 10/100Mbps Vladimir Oltean
2021-04-23 0:45 ` Ismail, Mohammad Athari
2021-04-23 0:53 ` Vladimir Oltean
2021-04-23 9:30 ` Ismail, Mohammad Athari
2021-04-23 18:11 ` Vladimir Oltean
2021-04-23 22:03 ` Ismail, Mohammad Athari
2021-04-27 15:08 ` Vladimir Oltean
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